Safety-envelope



(NoV Model.) i n H. R. HORR 81; D. H. MGFALL.

SAFETY ENVBLOPB.

Patented AprglO whom UNITED STATES PATENT OFFICE.

HENRY R. HORR AND DAVID H. MCFALL, OF RD LODGE, MONTANA. i

SAFETY-ENVELOPE.

SPECIFICATION forming part of Letters Patent N o. 518,189, dated April 10, 1 894. Application filed February 11,1893. Serial No. 461.870. (No model.)

v declare the following to be a full, clear, and

exact description of the invention, such as w1ll enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to improvements in safety envelopes and ithas for its object to provide an article of this class which shall possess superioradvantages in point of simpllclty of construction, as Well as inexpensiveness, and general efficiency. It is well known that in order to open an ordinary envelope which has been sealed with gum, without detection, it is only necessary to soften the gum by moisture. This is usually done by steam-- ing, and after such an operation, the ordinary envelope is readily sealed so that the fact that it has been opened cannot be known with f X and X are formed which are divided by the certainty.

The prime object of our invention is to provide an envelope which shall have means for eifectually sealing it against opening Without so destroying or mutilating the parts as to prevent any resealing without bearing clear proof of the fact that the envelope has been tampered with. K

The novelty resides in the peculiarities of construction and the arrange ment and adaptation of parts, all as more fully hereinafter described, shown in the drawings and then particularly pointed out in the appended claim.

The invention is clearly illustrated in the accompanying drawings, which, with the letters of reference marked thereon, form a part of this specification, and in-Which- Figure l is a perspective View of a finished envelope of the letter size. Fig. 2 is a vertical section through the center of Fig. l. Fig. 3 is a rear elevation of the envelope with the lower flap nnsealed. Fig. 4 is a rear elevation with the entire rear side unsealed, and Fig. 5 is a plan view showing the form of the paper composing the envelope.

Reference being had to the above figures, A represents a sheet of paper cut or stamped in the form shown in Fig. namely: the upper edge being shaped to form the central flap,

B and the two half side iiaps C C', the opposite ends have been foldedon the lines 'yg/and w fr', see Fig. 5. When the said ends combining the portions F. E and F F are turned inward the end composed of the portions E and F have their inner edges projected inwardly between the portions E and F to the extent shown by the dotted line tu', Fig. 3. The inner surface of the inner edge of the'portion E is then secured to the outer surface of the inner edge of the portion E', and this securement is continued through a like portion of the flaps C and C.. By this means two separate pockets partition provided by the inner overlapping parts ofthe portions E and E. Thenext step is to fold and gum the flap D against the body of the envelope, thus presenting the appearance shown in Fig. l.

The manner of sealing the envelope is as follows: the letter or other document is placed in the pocket X, and the flaps C C', which contain gum on both sides, is folded into pocket X, the flap B is then folded over and gummed to the back of the envelope.

It is obvious that in order for a dishonest person to remove the inclosure, it is necessary to free the edge of {iap B also flap O` C from within the pocket X and to accomplish this result without leaving any outward sign that the envelope has been tampered with, is impossible. The importance of this or other means ofpreventing opening of mail by dishonest persons will be apparent to those who have suffered for the want of it.

We do not wish to confine our invention to any particular size or form of envelope, as our invention is applicable to either letter, official, express, registered or bank envelopes.

By the improved construction herein shown IOO and described, we are enabled to manufacture p and place on the market a superior article, et a very moderate oost, and thus to meet the demands and Wants of the people.

Having thus fully described our invention, what We claim, and desire to secure by Letters Patent, is-

As animproved article of manufacture the herein described envelope having double end portions o1'flaps,ivl1ieh are open at their upper ends andhave the inner edge of one portion of each titted between the opposite similar portions when said parts are folded inwardly, to form double pockets ot' t depth equal to the depth of the body of the envelope, a lower Hap B, upper flaps C C', adapted to be folded inwardly and gurnined on both sides, and an adjacent upper flap to elose over the top of the body of the envelope, substan- Vitnesses:

W. J. STRATTON, L. R. HUNTER. 

